Question

Madison spent $1,192 on 11 textbooks. She calculated the average cost of a textbook to be $10.84. Is this correct

Answer 1

To find the average cost of 11 textbooks, take the total amount Madison spent ($1,192) and divide this amount by the total number of textbooks she bought (11 textbooks).

$1,192 / 11 textbooks = ~108.4; this is definitely way off from Madison's calculation, so she is incorrect. It looks like Madison moved the decimal point to the left once.